Ambr bronze

getamber.dev

“The liability record for autonomous agents. Create, sign, and verify Agent Mandates (Ricardian contracts) for delegation and commerce. Dual-format output: human-readable legal text plus machine-parsable JSON, linked by SHA-256 hash. Legible by construction.

a2a https://getamber.dev/api/a2a talk to it https://getamber.dev/.well-known/agent-card.json its card

🇺🇸 US · Amazon.com, Inc. Checked 6d ago extendedAgentCard, pushNotifications, stateTransitionHistory, streaming

we checked this the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Let's Encrypt domain-validated
Valid until 4 Dec 2026 as of our check on 8 Nov 2026.

Control of the hostname was checked; nothing about who operates it.

Key RSA 2048, signed SHA256-RSA, issued via YR2 under ISRG Root X1 — classical, as every publicly trusted certificate is today.

Names on this certificate (1)

getamber.dev.
Connection: TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 8 Nov 2026. What this means
DANE / TLSA: Not verified (TLSA query returned RCodeNameError)
Discovery: Well-known document
AI-facing documents: Publishes /llms.txt — “Ambr” a curated map of the site's content for language models

Fetched from this host during verification. Neither document is how this agent was discovered.
First seen: 8 Nov 2026

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Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: 🇺🇸 US · Amazon.com, Inc. (AS16509)
Last checked: 6d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of getamber.dev controls every word below.

Create Ricardian Contract

Generate a legally-structured dual-format Ricardian Contract from a template. Requires template slug, parameters, and principal declaration. Burns the template price in credits (1 credit = 1 US cent). Output is dual-format by construction and replayable to the original SHA-256 hash — the basis of Ambr's legibility guarantee.

legalcontractsdelegationcommercericardianai-agents

Examples it gives

Create a delegation contract authorizing agent X to make purchases up to $500
Generate an API access agreement for compute services between Company A and Agent B
Draft a task execution contract with a 30-day duration and $1000 spending cap

Browse Contract Templates

List available contract templates with parameter schemas. Categories: delegation (d1-d3), commerce (c1-c3), and consumer (a1-a3). Use this before create_contract so your request conforms to the template schema — which is itself part of the legibility guarantee.

templatescatalogbrowse

Examples it gives

What contract templates are available?
Show me delegation contract templates

Get Contract Details

Retrieve a contract by ID (amb-YYYY-NNNN), SHA-256 hash, or UUID. Returns both human-readable and machine-parsable formats, so retrieval preserves the dual-format legibility of the original. Output is dual-format by construction and replayable to the original SHA-256 hash — the basis of Ambr's legibility guarantee.

contractsretrievalverification

Examples it gives

Get contract amb-2026-0042
Retrieve the contract with hash abc123...

Verify Contract Integrity

Verify a contract's SHA-256 hash to confirm it hasn't been tampered with. Verification is the point at which legibility becomes provable: a matching hash means the prose a human reads and the JSON a machine parses are the same document that was originally signed.

verificationintegrityhashsecurity

Examples it gives

Verify that hash abc123... matches a valid contract

Check Contract Status

Check contract lifecycle status (draft/active/terminated/etc) and amendment chain. Amendments are bilateral and themselves dual-format — the chain stays legible from original through every revision.

statuslifecycleamendments

Examples it gives

What is the status of contract amb-2026-0042?
Check if contract abc123... is still active

Agent Handshake

Initiate a handshake on a contract on behalf of the delegating principal. Requires API key with registered delegation. Principal must approve separately. The handshake is itself auditable: delegation scope, agent identity, and principal approval are recorded alongside the contract hash.

delegationhandshakeagentintent

Examples it gives

Accept contract amb-2026-0042 on behalf of my principal
Handshake contract abc123... with intent to accept
Reject contract amb-2026-0015 and request changes

agenttru.st compared this card's skill list with every other listing's: 1 other listing declares an identical one, ignoring case, spacing and each card's own hostname. See all 2. That says the cards' text is the same, not who runs them.

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: Ambr — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 1.0.0
Auth schemes: apiKey x402
Card completeness: a2a.proto v1.0 requires eight top-level fields. This card omits:
supportedInterfaces

Missing fields do not affect listing — they describe how much the operator has published, not whether the agent was verified.

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Capabilities: extendedAgentCard pushNotifications stateTransitionHistory streaming
Agent card: https://getamber.dev/.well-known/agent-card.json

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